Quest Diagnostics Drug Testing Index (DTI) Shows Steep Decline in U.S. Positivity Rates

Key findings from the special Quest Diagnostics 25th anniversary Drug Testing Index (DTI)includes data from more than 6.7 million tests:

  • The positivity rate for the Combined U.S. Workforce declined 74%, from 13.6% in 1988 to 3.5% in 2012.
  •  The positivity rate for the Federally Mandated, Safety Sensitive Workforce declined by 38%, from 2.6% in 1992 to 1.6% in 2012.
  • The positivity rate for the U.S. General Workforce declined by 60%, from 10.3% in 1992 to 4.1% in 2012.
 Learn More – View the full report: Quest Diagnostics 25th Anniversary Drug Testing Index
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